Download SM-9082 - Ansaldo STS

Union Switch & Signal Inc., an Ansaldo Signal company
1000 Technology Drive, Pittsburgh, PA 15219 ● 645 Russell Street, Batesburg, SC 29006
SM 9082
PN-150SST
Solid State Timer
(Part Numbers N40107201,
N40107202, and N40107203)
♦ Installation
♦ Operation
Copyright © 2004
Union Switch & Signal Inc.
SM 9082, Original, February 2004
Proprietary Notice
This document and its contents are the property of Union Switch & Signal Inc.
(hereinafter US&S). This document has been furnished to you on the following
conditions: no right or license under any patents or any other proprietary right in respect
of this document or its content is given or waived in supplying this document. This
document or its content are not to be used or treated in any manner inconsistent with the
rights of US&S, or to its detriment, and are not to be copied, reproduced, disclosed to
others, or disposed of except with the prior written consent of US&S.
Important Notice
US&S constantly strives to improve our products and keep our customers apprised of changes
in technology. Following the recommendations contained in the attached service manual will
provide our customers with optimum operational reliability. The data contained herein purports
solely to describe the product, and does not create any warranties.
Within the scope of the attached manual, it is impossible to take into account every eventuality
that may arise with technical equipment in service. Please consult your local US&S Account
Executive in the event of any irregularities with our product.
We expressly disclaim liability resulting from any improper handling or use of our equipment,
even if these instructions contain no specific indication in this respect. We strongly recommend
that only approved US&S spare parts be used as replacements.
SM 9082, Original, February 2004
i
Revision History
Revision History
ii
Rev.
Date
Nature of Revision
Original
February 2004
Original Issue
SM 9082, Original, February 2004
Table of Contents
Table of Contents
Section 1.
1.1.
1.2.
1.3.
1.4.
1.5.
1.5.1.
1.5.2.
1.5.3.
1.6.
1.7.
1.8.
Introduction .................................................................................................................................1-1
Background.................................................................................................................................1-1
General Description .....................................................................................................................1-1
Application ...................................................................................................................................1-1
PN-150SST Specifications ..........................................................................................................1-2
Controls, Indications, and Identification.......................................................................................1-3
Toggle Switches ...................................................................................................................1-3
LED Display ..........................................................................................................................1-3
Identification..........................................................................................................................1-3
Input Power..................................................................................................................................1-3
Output Power ...............................................................................................................................1-3
Safety ..........................................................................................................................................1-4
Section 2.
Equipment Description..............................................................................................................2-1
2.1.
PN-150SST Solid State Timer .....................................................................................................2-1
Section 3.
Installation ...................................................................................................................................3-1
3.1.
PN-150SST Preparation ..............................................................................................................3-1
3.2.
Timer Indexing .............................................................................................................................3-1
3.3.
Receptacle Contact Springs ........................................................................................................3-3
3.4.
Crimping Wires into Receptacle Contact Springs .......................................................................3-3
3.5.
Programming the Delay Time ......................................................................................................3-4
3.5.1.
Adjustment Ranges ..............................................................................................................3-4
3.5.2.
Toggle Switch Functions (Figure 3-2) ..................................................................................3-4
3.5.3.
Programming Sequence - Short Range ...............................................................................3-5
3.5.4.
Programming Sequence – Long Range ...............................................................................3-6
3.6.
Field Testing the Delay Time .......................................................................................................3-7
3.7.
Programming the Slow Drop Away Time.....................................................................................3-8
3.7.1.
Programming Sequence - Short Range ...............................................................................3-8
3.7.2.
Programming Sequence - Long Range................................................................................3-9
3.8.
Field Testing the Drop-Away Delay Time ..................................................................................3-10
Section 4.
Troubleshooting .........................................................................................................................4-1
4.1.
Error Codes..................................................................................................................................4-1
4.2.
Frequently Asked Questions by Topic.........................................................................................4-3
Section 5.
Maintenance ................................................................................................................................5-1
Section 6.
Technical Support ......................................................................................................................6-1
SM 9082, Original, February 2004
iii
Table of Contents
List of Figures
Figure 2-1 - PN-150SST Solid State Timer..............................................................................................2-1
Figure 3-1 - PN-150SST Rear View.........................................................................................................3-2
Figure 3-2 - Toggle Switch Functions ......................................................................................................3-4
List of Tables
Table 1-1
Table 1-2
Table 2-1
Table 3-1
Table 3-2
Table 3-3
Table 3-4
Table 3-5
Table 3-6
Table 3-7
Table 4-1
Table 4-2
Table 4-3
iv
-
PN-150SST Assemblies and Mounting Base........................................................................1-2
PN-150SST Operating Characteristics..................................................................................1-2
Timing Information .................................................................................................................2-1
Indexing Pin Locations...........................................................................................................3-2
Crimping Tools for Wire Installation.......................................................................................3-3
Short Range Programming Sequence...................................................................................3-5
Long Range Programming Sequence ...................................................................................3-6
Testing the PN-150SST Time Delay Setting .........................................................................3-7
Programming Sequence - Short Range ................................................................................3-8
Programming Sequence - Long Range .................................................................................3-9
Troubleshooting Table ...........................................................................................................4-1
Error Codes ...........................................................................................................................4-2
Frequently Asked Questions .................................................................................................4-3
SM 9082, Original, February 2004
Introduction
Section 1. Introduction
1.1. Background
Union Switch & Signal originally developed the PN-150EVT electronic vital timer relay to serve as a
solid-state replacement for thermal and mechanical timer relays. The PN-150EVT’s electronic module
and contacts, which are in a three-front/one-back arrangement, are fitted into a standard US&S
PN-150-style relay frame. To offer a solid-state timer that can drive an external relay with more
contacts, which is suitable for a wider variety of applications, US&S developed the PN-150SST SolidState Timer.
1.2. General Description
The US&S PN-150SST Solid-State Timer consists of an electronic module mounted in a standard
US&S PN-150 relay frame. The timer’s electronic module is the same as the one used in the
PN-150EVT unit and includes a digital display. Because it’s designed to drive an external vital relay,
the PN-150SST contains no relay contacts.
1.3. Application
CAUTION
The PN-50SST provides a positive (10B) and negative (11C) output
to drive a repeater relay coil after the preset time has expired. This
power must not be connected to any other energy source.
The PN-150SST Solid-State Timer is available in three versions:
•
The PN-150SST/SP offers programmable slow-pick-up capability.
•
The PN-150SST/DPSD is a programmable slow drop away timer with a five-second pick-up delay.
This unit is intended to serve as a loss-of-shunt timer in conjunction with a delayed code change or
a delayed initiation of grade crossing signals.
•
The PN-150SST/SD features a programmable slow drop away capability. The pick-up is also
nominally delayed by approximately 0.3 seconds to guard against unwanted pick-up from a
momentary input.
A US&S PN-150 relay (240 to 400 ohms) is typically driven by the PN-150SST timer. The output
energy of the PN-150SST is approximately 68% of the input energy.
Table 1-1 provides ordering references.
SM 9082, Original, February 2004
1-1
Introduction
Table 1-1 - PN-150SST Assemblies and Mounting Base
US&S Part Number
Description
N40107203
PN-150SST/SD, slow drop timer
N40107202
PN-150SST/DPSD, delayed pick, slow drop timer
N40107201
PN-150SST/SP slow pick timer
N4513760302
Mounting base with hardware (14-16 contacts)
N4513760601
Alstom/Safe compatible mounting base with hardware (14 - 16
contacts)
1.4. PN-150SST Specifications
Table 1-2 presents the operating characteristics of the PN-150SST.
Table 1-2 - PN-150SST Operating Characteristics
Parameter
Value
Dimensions
H = 8¼”, W = 3¼”, D = 9 7/64”
Operating Voltage
Control: 9.2 - 30 Vdc filtered or 9.2 - 24 Vdc ± 0.2 V unfiltered full wave
rectified DC from a 25 Hz or greater AC source
Local: 9.2 - 30 Vdc (source may be steady or coded at a minimum 75 ppm
with at least a 35% on-time)
Both inputs protected against reverse polarity
Current draw
Maximum continuous current is 125 mA with a 600 mA surge current on
startup
Indexing
4-0-7-2 for N40107201
4-0-7-3 for N40107202
4-0-7-4 for N40107203
Operating Temperature
-40° to 158° F (-40° to 70° C)
Humidity
0-95% relative humidity, non-condensing
Timing Range
Short Range: 0 to 59.9 seconds, 0.1-second increments
Long Range: 0 to 52 minutes (0-3120 seconds), 1-second increments
Accuracy
±0.3 seconds with Vin >10 Vdc
Below 10 Vdc time may run long by an additional 0.1 seconds
Better than 0.1% under all conditions at any time setting (external relay
mechanism pick-up delays approximately 250-300 mS). Add two seconds
to timing interval for initialization delay if local is energized simultaneously
with commencement of timing cycle
Dielectric Strength
2 kv between control and local input circuitry
2 kv between input circuitry and frame
1-2
SM 9082, Original, February 2004
Introduction
1.5. Controls, Indications, and Identification
1.5.1.
Toggle Switches
Two toggle switches located on the face of the timer allow the user to program the timing interval in
the shop or field without disassembling the relay, breaking the mechanism seal, or disturbing internal
adjustments. An independent, sealable cover encloses the toggle switches. This cover may be sealed
using a relay seal to prevent tampering with the time settings. Refer to Section 3.5 for instructions on
programming the time delay.
1.5.2.
LED Display
The PN-150SST is provided with a large, easy-to-read, four character alphanumeric LED display
located on the face of the timer. In operation, the display serves to indicate the status of the timer:
deenergized, running, or energized. While programming the timing interval, the display prompts the
user’s actions and indicates the preset timing interval. The LED display will also indicate error codes
when hardware or logic faults are detected.
1.5.3.
Identification
Each US&S plug-in relay is provided with a nameplate indicating the type of device, part number, and
serial number. The serial and part numbers are engraved on this nameplate. An inspection sticker
secured to the inside of the cover shows the specific operating values and serial number of the device.
1.6. Input Power
The nominal range of DC input power for the PN-150SST is 9.2 - 30 Vdc, corresponding to a battery
composed of 5 to14 lead-acid cells or 8 to 22 nickel-alkaline cells.
The PN-150SST has two inputs: control (9B+, 12B-) and local (7B+, 8B-). Local energy is used for
various support purposes, including operation of the microprocessor, the LED display, and associated
circuitry. Control energy initiates the timing cycle and provides power to a conditional power supply
and relay driver which directly drives the relay coil, thus the control input current will be somewhat
higher and varied compared to the local input. Both inputs require dc energy within the range of 9.2 to
30 Vdc (9.2 to 24 Vdc unfiltered full wave). The combined local and control load is less than one watt
while the relay coil is energized at 9 to 12 Vdc.
Voltages less than 9.2 Vdc at the control input will temporarily halt operation. Circuitry is protected
against damage from sustained voltage exceeding 33 volts by means of Polyswitches®. A
Polyswitch® acts much like a fuse but, unlike a fuse, it will reset to a low resistance state when the
input voltage is restored to the normal operating range. Local and control inputs are protected against
polarity reversal.
1.7. Output Power
The PN-150SST output can operate a 200 to 400 ohm coil. The voltage output is approximately 68%
of the input voltage.
SM 9082, Original, February 2004
1-3
Introduction
1.8. Safety
The design of the hardware and software within this timer is such that any failure or combination of
failures will cause the relay to open or remain open. Fail-safe design principles assure that under no
circumstances will there be a voltage output less than the time delay following application of energy to
the control input.
1-4
SM 9082, Original, February 2004
Equipment Description
Section 2. Equipment Description
2.1. PN-150SST Solid State Timer
The PN-150SST/SP (slow pick-up), the PN-150SST/DPSD (delayed pick-up/slow drop away), and the
PN-150SST/SD (slow drop away) are vital timer units (Figure 2-1). These units are similar to the
N401017xx and N401033xx series Timer Relays except the electromechanical relay has been removed
from the package to provide flexibility to drive an external relay with more contacts. The
microprocessor-based printed circuit board mounted within the enclosure provides the identical timing
function, either slow pick-up, delay pick-up/slow drop away, or slow drop away to the external relay.
The package design is based on the standard PN-150 relay package. Timing information is provided in
Table 2-1.
Figure 2-1 - PN-150SST Solid State Timer
Table 2-1 - Timing Information
Parameter
Value
Time Delay
0.1 sec to 52 minutes or 1 sec to 52 minutes
Slow Pick Timer
The Slow Pick timer provides an output to pick-up the external
relay after the microprocessor detects the presence of the
control input and processes the time delay as set in the unit.
The output is removed when the control input is removed.
SM 9082, Original, February 2004
2-1
Equipment Description
Parameter
2-2
Value
Slow Drop Timer
The Slow Drop timer removes the output voltage to the
external relay only after the microprocessor detects the
absence of the control input and completes the time delay as
set in the unit. The output is reapplied to the external relay
when the control input is reapplied.
Delayed Pick/Slow Drop
timer
The Delayed Pick/Slow Drop timer provides both a delayed
pick-up, with the output applied 5 seconds after the
microprocessor detects the presence of the control input. It
also features slow drop-away, with the output removed only
after the microprocessor detects the absence of the control
input and completes the time delay as set in the unit.
SM 9082, Original, February 2004
Installation
Section 3. Installation
3.1. PN-150SST Preparation
Perform the following steps to prepare the PN-150SST for use:
1. Attach the mounting base to the rack using the hardware provided with the optional base.
2. Wire the timer to specific application circuits. (Refer to Figure 3-1 for index pin locations and
Section 3.4 for wiring and crimping information.)
3. Insert the timer into the mounting base.
4. The relay is now ready to apply power and program.
3.2. Timer Indexing
This relay is equipped with indexing pins to prevent insertion of incorrect equipment into a mounting
base. Each timer has an indexing plate which is applied to the mounting base at the time of initial
installation.
The following data defines the indexing that has been established for timers covered by this manual.
a.
The index code always consists of four figures (such as 0001, 0002, or 0101) and is used for both
the timer and the indexing plate on the mounting base.
b.
The index code for each mounting base is determined by the placement of the holes in the
numbered vertical rows of the large white nylon indexing plate which is affixed to the front of the
mounting base (Table 3-1). Never remove the indexing plate from the mounting base unless it is
damaged or the indexing is to be purposely changed to accommodate a different part number.
Discard the indexing plate unless it is needed for replacement of a damaged indexing plate or for
application to a new mounting base.
WARNING
Never drill new holes in a base indexing plate which will permit application
of relays with different part number or change indexing pins on the back of
a relay unless it is being converted to a new part number. Drilling new
holes in the base indexing plate will compromise the safe functioning of the
circuit.
SM 9082, Original, February 2004
3-1
Installation
Table 3-1 - Indexing Pin Locations
Relay Part
No.
Row
A
B
C
D
N40107201
4
0
7
2
N40107202
4
0
7
3
N40107203
4
0
7
4
C
B
A
7
8
9
10
POWER IN (+)
POWER IN (-)
CONTROL (+)
11
(-)
12
(+)
CONTROL (-)
Figure 3-1 - PN-150SST Rear View
3-2
SM 9082, Original, February 2004
Installation
3.3. Receptacle Contact Springs
The one-piece mounting base with hardware (N4513760302 and N4513760601) includes a full
complement of receptacle contact springs (M451142-2702) to accommodate one or two #14 - #16
wires, mounting fasteners, and tags. It can also be equipped with receptacle contact springs for one or
two #10 - #12 wires (M451142-2703), or for one or two #18 - #20 wires (M451142-2701). Make
certain which type of solderless receptacle contact springs accompany the mounting base before
proceeding with their installation. Inspect each solderless receptacle contact spring before proceeding
with installation.
The following is recommended when installing solderless receptacle contact springs:
a. Receptacle contact springs must be inserted into the base with the lanced tab up.
b. Make certain that the lanced tab is slightly compressed as the receptacle contact spring is inserted
along the top of the cavity. The lanced tab could have been bent during handling, and therefore
might not provide the required contact pressure after the relay is inserted. If the lanced tab does not
touch, slightly compress using fingers or suitable tool.
c. After insertion, pull firmly on the wire to make certain the receptacle contact spring is locked in the
mounting base.
3.4. Crimping Wires into Receptacle Contact Springs
Use the following procedure to ensure a good electrical and mechanical connection between the
conductor wire and the receptacle contact spring. Table 3-2 identifies the correct crimping tool to be
used when installing wires in receptacle contact springs.
Table 3-2 - Crimping Tools for Wire Installation
Crimping Tool
Wire Size
Receptacle
Contact Spring
J397138
#10/#12 AWG
M451142-2703
J397139
#14/#16 AWG
M451142-2702
J397188
#18/#20 AWG
M451142-2701
1. Strip 3/16 in. (0.187 in. or 0.47 cm.) of insulation from the end of the wire.
2. Place the receptacle contact spring into the jaws of the proper crimping tool. When using only one
wire, use the shortest barrel.
3. Partially close the crimping tool jaws against the receptacle contact spring to hold it in place. (Do
not crush the receptacle contact spring barrel at this time.)
4. Insert the stripped end of the wire completely into the receptacle contact spring barrel. Squeeze the
tool handles until crimping is completed and the jaws release. When using both barrels, it is more
convenient to attach the first wire to the longest barrel.
SM 9082, Original, February 2004
3-3
Installation
5. Remove the crimped receptacle contact spring from the tool and inspect the connection. Make
certain that the wire is flush with the crimped barrel and that there are no loose strands of wire.
3.5. Programming the Delay Time
The timer’s delay time is adjusted by using the two toggle switches located under the transparent cover
on the face of the timer. Remove the two screws holding the transparent cover in place to access the
switches. Note: The screw heads are drilled so that they can be wired together and sealed to secure the
settings after the adjustment is made.
3.5.1.
Adjustment Ranges
There are two adjustment ranges:
Short Range
00.0 seconds - 59.9 seconds, adjustable in 0.1-second increments. and
Long Range 0 seconds – 52 minutes (0 - 3120 sec.), adjustable in 1-second increments.
3.5.2.
Toggle Switch Functions (Figure 3-2)
The upper toggle switch (SW1) is normally used to increase or decrease values on the LED display.
When SW1 is pushed upwards, it will increase the current value. When SW1 is pushed down it will
decrease the current value.
The lower toggle switch (SW2) serves the “ENTER” and “ESCAPE” functions. When SW2 is
pushed upwards, it activates the ESCAPE function. When SW2 is pushed down, it activates the
ENTER function.
Sections 3.5.3 and 3.5.4 explain the time delay programming sequence for the short and long time
delay ranges.
Increase
SW1
Decrease
Escape
SW2
Enter
Figure 3-2 - Toggle Switch Functions
3-4
SM 9082, Original, February 2004
Installation
3.5.3.
Programming Sequence - Short Range
Table 3-3 lists the steps necessary to program the PN150SST in its short range.
Table 3-3 - Short Range Programming Sequence
Setup
Action
Result / LED Display
1. Apply 9.2 to 30 Vdc to local
terminals (7B+, 8B-).
SLO
Remove energy from control
input (9B+, 12B-) if present.
10.2
ALTERNATING DISPLAY
2. Press ESCAPE to enter
programming mode.
Increase
< 60
SW1
Decrease
Escape
SW2
Enter
Press INCREASE or
DECREASE to select short
timing range (00.0 sec. to
59.9 sec.).
Increase
SW1
< 60
Decrease
Press ENTER to accept
setting
Escape
SW2
Enter
3.
Press INCREASE or
DECREASE to change
value of flashing digit (range
of tens digit is 0-5).
Underlined digit represent a flashing
digit.
10.2
Press ENTER to accept
timing.
4.
SM 9082, Original, February 2004
Same as above for next
digit.
10.2
3-5
Installation
Setup
Action
Result / LED Display
5.
Same as above for next
digit.
10.2
6.
Wait 2 seconds.
10.2
SLO
7. Unit is ready for operation.
10.2
ALTERNATING DISPLAY
8. Field test of timing interval must
be performed before placing unit
in service. (See Section. 3.6).
3.5.4.
Programming Sequence – Long Range
Table 3-4 lists the steps necessary to program the PN150SST in its long range.
Table 3-4 - Long Range Programming Sequence
Setup
Action
1. Apply 9.2 to 30 Vdc to local
terminals (7B+, 8B-).
SLO
Remove energy from control
input (9B+, 12B-) if present.
2. Press ESCAPE to enter
programming mode.
Increase
SW1
Press ENTER to accept long
timing range (0000--3599).
Increase
Decrease
Escape
Escape
SW1
> 60
SW2
SW2
3.
0621
ALTERNATING DISPLAY
Decrease
Enter
Result / LED Display
Enter
Press INCREASE or
DECREASE to change value
of flashing digit (range of
minutes tens digits is 0-5).
Press ENTER to accept
setting.
Underlined digit represents a flashing
digit.
06 M
4.
Same as above for next digit.
06 M
5.
Same as above for next digit.
21 S
3-6
SM 9082, Original, February 2004
Installation
Setup
Action
Result / LED Display
6.
Same as above for next digit.
21 S
7.
Wait 2 seconds.
0621
8. Unit is ready for operation.
SLO
0621
ALTERNATING DISPLAY
9. Field test of timing interval
must be performed before
placing unit in service. (See
Section 3.6).
3.6. Field Testing the Delay Time
The delay time must be must be field-tested whenever a PN-150SST is installed or replaced with a new
PN-150SST. The purpose of the check is:
1. To ensure the user has correctly programmed the specified time interval,
2. That identical PN-150SSTs with different time delays have not been accidentally exchanged or
misidentified, and
3. To verify that the wiring between the PN-150SST and the repeater is correct.
The example in Table 3-5 shows how to reliably field-test the PN-150SST’s time delay setting.
Table 3-5 - Testing the PN-150SST Time Delay Setting
Setup
1. Apply 9.2 to 30 Vdc to local
terminals (7B+, 8B-).
2.
SM 9082, Original, February 2004
Action
Check idle display indication
for normal alternating action.
Verify that time interval
agrees with value shown on
circuit plans or as otherwise
directed.
Apply 9.2 to 30 Vdc to control
input (9B+, 12B-) and
simultaneously start
stopwatch. Observe
countdown indication on
display.
Result / LED Display
SLO
0621
ALTERNATING DISPLAY
START
FINISH
0621
0000
COUNTDOWN
3-7
Installation
Setup
Action
3.
Result / LED Display
Halt stopwatch when display
indicates timer is energized.
Use a voltmeter to check the
output voltage on contacts
10B (+) and 11C (-) on the
rear of the relay. The
measured output voltage
should be 68% of the input
voltage.
4.
Remove energy from control
input (9B+, 12B-).
The voltage on 10B(+) and
11C(-) should be 0 volts.
PCKD
SLO
0621
ALTERNATING DISPLAY
3.7. Programming the Slow Drop Away Time
3.7.1.
Programming Sequence - Short Range
Table 3-6 - Programming Sequence - Short Range
Setup
1. Apply
9.2 to 30VDC to local
terminals (7B+, 8B-).
Remove energy from control
input (9B+, 12B-) if present.
Action
Result / LED Display
If energy is not present on the
control input, display will
read:
DRPD
SLO
10.2
ALTERNATING DISPLAY
2. Press
ESCAPE to enter
programming mode.
Increase
SW1
> 60
Decrease
Escape
SW2
Enter
To accept > 60 sec., press
enter (SW2 down).
Otherwise, toggle SW1 up or
down. The display will then
indicate < indicating less than
60 seconds.
Increase
SW1
< 60
Decrease
Press ENTER to accept
setting
3-8
SM 9082, Original, February 2004
Installation
Setup
Action
Result / LED Display
Escape
SW2
Enter
Press INCREASE or
DECREASE to change value
of flashing digit (range of tens
digit is 0-5).
3.
Underlined digit represent a flashing
digit.
10.2
Press ENTER to accept
timing.
4.
Same as above for next digit.
10.2
5.
Same as above for next digit.
When ENTER is last
activated the time delay is
set.
10.2
6.
Wait two seconds.
10.2
7. Unit is ready for operation.
8. Field test unit before placing in
service.
3.7.2.
DRPD
See Section 3.8.
Programming Sequence - Long Range
Table 3-7 - Programming Sequence - Long Range
Setup
1. Apply 9.2 to 30VDC to local
terminals (7B+, 8B-).
Remove energy from control
input (9B+, 12B-) if present.
2. Press ESCAPE to enter
programming mode.
Increase
Action
If energy is not present on the
control input, display will
read:
Decrease
Escape
Escape
SM 9082, Original, February 2004
ALTERNATING DISPLAY
SW1
SW2
SW2
3.
0621
Press ENTER to accept high
timing range (0000--3120)
Decrease
Enter
SLO
DRPD
Increase
SW1
Result / LED Display
> 60
Enter
Press INCREASE or
DECREASE to change value
of flashing digit (range of
Underlined digit represent a flashing
digit.
3-9
Installation
Setup
Action
minutes tens digits is 0-5)
Press ENTER to accept
setting.
Result / LED Display
06 M
4.
Same as above for next digit.
06 M
5.
Same as above for next digit.
21 S
6.
Same as above for next digit.
When ENTER is last
activated the time delay is
set.
21
7.
Wait two seconds.
0621
8. Unit is ready for operation
9. Field test unit before placing in
service
S
DRPD
See Section 3.8.
3.8. Field Testing the Drop-Away Delay Time
The delay time must be field tested whenever a PN-150SST slow drop away version relay is installed
or replaced with a new relay. The purposes of the check are:
To ensure the user has correctly programmed the specified time interval.
To ensure that identical relays with different time delays have not been accidentally exchanged or
misidentified.
3-10
SM 9082, Original, February 2004
Troubleshooting
Section 4. Troubleshooting
In the case of a malfunctioning PN-150SST, use Table 4-1 to help identify possible causes of the
problem.
Table 4-1 - Troubleshooting Table
Symptom
Possible Cause
1. Absence of the LED display.
This may indicate a loss of local energy or failure of
the internal electronics. Return unit to US&S for
evaluation and repair.
2. Repetitive error codes followed by
shutdown of timer. (See Section 4.1 for a
description of error codes).
This may indicate problems with the timer’s logic or
hardware faults. Return unit to US&S for evaluation
and repair.
3. Timing cycle does not initiate when control
energy is applied.
This may indicate one of the following:
1. The desired time delay has not been correctly
programmed.
2. Possible failure of internal electronics.
3. Control voltage intermittent or below 9 Vdc.
4. Time delay not in accordance with desired
value.
Problem most likely due to errors in programming of
the time delay.
5. Failure of the timer to pick-up upon
completion of the timing cycle.
Check the output voltages on 10B(+) and 11C(-)
Check the calibration values on the repeater and
replace if out of specification.
It the checks were acceptable, return the unit to
US&S for evaluation and repair.
6. The ESCAPE switch is actuated but unit
does not display “>60” prompt.
Check to confirm absence of control energy.
Momentarily remove the unit from the base to force
re-initialization of the system. Replace unit if
problem persists. Return unit to US&S for evaluation
and repair.
In many instances, the source of trouble may be found by close examination of the timer, its base, and
associated wiring. To prevent unnecessary delay and expense of “No Trouble Found” returns to the
shop or US&S, a brief explanation of specific conditions and type of trouble encountered should
accompany each defective timer. Such information is especially important in cases of intermittent
trouble or where display of error codes has been observed.
The sealed mechanism cover must not be opened except by qualified personnel in a shop equipped to
properly calibrate and test timers. All defective PCBs should be returned to US&S for evaluation and
repair. Timers exposed to moisture, electrical surges or mishandling must be returned to the shop or
US&S for refurbishment and retest.
4.1. Error Codes
Error codes appear on the LED display when logic or hardware faults are detected. All faults cause
immediate termination of the timing cycle. If the timing cycle is complete, faults will cause immediate
drop-away of the timer. The system will reset two seconds after the fault is detected. If nine
SM 9082, Original, February 2004
4-1
Troubleshooting
consecutive faults occur without successful operation for at least one second, then the system will
become dormant, stopping timing operation and maintaining display of the latest error code until local
power is momentarily cycled off and on. Table 4-2 presents a list of possible error codes.
Table 4-2 - Error Codes
Error
INSTRUCTION_ERROR
4-2
Display
INSTR
Reason
Generic HC11 instruction failure
RAM_ERROR
RAM
RAM write/read failure
RAM_1S_ERROR
RAM1
RAM walking 1’s failure
DIAG_ERROR
DIAG
Generic diagnostic failure
CONFIG_ERROR
DIAG
HC11 configuration register failure
GLITCH_ERROR
GLIT
Generic double compare failure
RUN_AWAY_ERROR
AWAY
Unused interrupt failure
EXEC_ERROR
EXEC
Generic executive failure
CHECKSUM_ERROR
CHKS
EPROM checksum failure
BCH_ERROR
BCH
EPROM BCH failure
RESET_ERROR
REST
Generic reset failure
ILLEGAL_IRQ
IRQB
Invalid interrupt failure
BAD_STACK
STKB
Stack out-of-range failure
BAD_RETURN
RETB
Bad return address from interrupt failure
BAD_DIAGS
DIAG
Diagnostic failure
MODE_ERROR
MODE
Generic menu mode error
COP_ERROR
ECOP
COP monitor reset
NO_CLOCK_ERROR
NCLK
No clock monitor reset
EEPROM_ERROR
EPRM
Generic EEPROM filure
BAD_DIVIDE
BDIV
Bad divide or divide by 0 failure
ERASED_EEPROM_WAIT
WAIT
EEPROM erased and awaiting power to
be recycled
T1_ERROR
T1ER
Invalid internal interrupt counter
UNSTABLE_INPUT
UNST
Input circuit may be failed or input signal
is intermittent
BAD_INPUT_ERROR
IBAD
Input circuit failure, HC11 pins 20, 21,
and 50
OUTPUT_ERROR
0BAD
Mismatch of HC11 pins 14 and 22
T2_ERROR
T2ER
Second time source failure, HC11 pins 32
and 33
PULSE_ERROR
PULS
Pulse accumulator error, HC11 pin 27
SM 9082, Original, February 2004
Troubleshooting
4.2. Frequently Asked Questions by Topic
Table 4-3 presents a list of frequently asked questions by topic.
Table 4-3 - Frequently Asked Questions
Topic
Programming
Switches
Time Setting
Question
Answer
What if the programming switches are
manipulated during timing cycle or while
relay is energized?
Programming switch activity is ignored
while the control input is energized. The
timing cycle will not be interrupted if
programming switches are manipulated
while control energy is applied.
What if a programming switch is stuck
in a position other than center?
Stuck programming switches will be
ignored or unit will shutdown while
display shows the “>60” prompt.
What if both programming switches are
simultaneously actuated?
This won’t cause any harm to the timer
but may result in undesired results.
What if the time delay is set to 0000?
Timer will pick-up with zero time delay
(pick-up delay of the timer mechanism
is roughly 200-400mS, depending on
factors such as control voltage,
temperature and calibration variables).
Can time setting be set to wrong setting
for a specific application?
No general purpose time element can
protect against such errors. The user
must program and test the time interval
whenever a PN-150SST is installed or
replaced. Proper timing is assured only
after the unit is tested while plugged-in
and connected to the actual controlling
circuit. Note that FRA rules 49 CFR
236.109 and 234.265 require the proper
time setting to be shown on the circuit
plans or the relay.
What prevents improper exchange of
PN-150SSTs with different time
settings?
Testing
Could a fifth index pin be added to
provide indexing protection for timers
having different time intervals?
No. Addition of extra holes in the index
plate could allow improper installation of
timers having only four pins.
Should time delay be checked with
some type of calibrated timing device or
chart recorder?
Timing may be checked with a
stopwatch or wristwatch. Assuming a
timing error of +/- 10% is allowable, the
worst-case combined error of the PN150SST and an ordinary wristwatch
would still be well within the 10% limit at
the maximum interval of 3120 seconds
(an error of 6 minutes per hour).
Specialized time measuring devices are
needed only where 0.1 second timing
increment is significant or for the user’s
convenience in making long interval
measurements.
SM 9082, Original, February 2004
4-3
Troubleshooting
Topic
Display
Error Codes
Local Input
4-4
Question
Answer
What if individual LED or row/column of
LEDs in display is not as bright as
usual?
Ignore unless digit(s) cannot be easily
distinguished.
What if display is intermittent, dim, or
unrecognizable or otherwise incorrect.
Check the list of status and error codes.
Momentarily remove the unit from base
to force re-initialization of system.
Replace unit if problem persists. Return
to US&S for evaluation and repair.
What if display appears frozen?
Unit might be waiting for completion of a
programming session due to accidental
actuation of the ESCAPE switch.
Momentarily remove the unit from base
to force re-initialization of system.
Replace if problem persists and return
malfunctioning unit to US&S for
evaluation and repair.
What if unit functions normally but
frequently displays an error code?
Unit should be replaced at the earliest
opportunity. Return to US&S for
evaluation and repair.
What if unit display error code and
appears to be locked-up, timing cycle
will not run?
Note the error code. Momentarily
remove the unit from base to force reinitialization of system. Replace unit if
problem persists. Return to US&S for
evaluation and repair.
What if local energy is switched on/off
simultaneously with control energy?
Pick-up delay will be consistently
extended exactly two seconds longer
than the set time interval due to system
initialization delay when local is first
powered-up.
What if local energy is turned off while
control energy remains on?
Timing cycle will be cutoff after
approximately one second. A new
timing cycle will commence immediately
upon restoration of local energy and
completion of the two second
initialization delay.
What if there is an interruption of local
energy during programming session?
Previous time setting will be retained.
What if local energy is coded at 75 or
240 ppm ?
The PN-150SST is intended to operate
normally with the local input coded or
steady. If coded, the code rate must be
no less than 75 ppm with a 35% ontime.
What if local energy drops below 9.2
volts?
Although the control voltage must be
9.2 volts or higher, the local voltage can
be reduced below this value before
operation is interrupted. A new timing
cycle (or return to idle state) will begin
once local energy is restored to at least
5-6 volts.
SM 9082, Original, February 2004
Troubleshooting
Topic
Control Input
Question
Answer
What if control energy is momentarily
interrupted?
Interruptions less than 250 milliseconds
will not disrupt operation. Longer
interruptions will cause a new timing
cycle to begin once energy is restored.
What if the unit is removed from base
during timing cycle?
A new timing cycle will commence once
unit is reinstalled and/or energy is
applied to the local and control inputs.
By design, the PN-150SST cannot
short-time and there can be no residual
effect caused by previous incomplete
timing cycles.
What if control and local energy are
interrupted during timing cycle?
What if unit is subjected to repeated
incomplete timing cycles due to circuit
design?
What if unit is subjected to frequent
brief interruptions of control energy
during timing cycle caused by poor
shunting of track circuits?
What if control energy drops below 9.2
volts.
SM 9082, Original, February 2004
Unlike electro-mechanical timers, no
mechanical wear results from aborted
timing cycles. Timer control circuits
may often be simplified to take
advantage of this characteristic.
Same as effect of interruption of control
energy.
4-5
Troubleshooting
4-6
SM 9082, Original, February 2004
Maintenance
Section 5. Maintenance
No field or shop maintenance is required on the PN-150SST Solid State Timer. If the timer fails to
operate properly, it is recommended that the relay be sent back to the US&S repair facility at 645
Russell Street, Batesburg, SC 29006.
SM 9082, Original, February 2004
5-1
Maintenance
5-2
SM 9082, Original, February 2004
Technical Support
Section 6. Technical Support
The Rapid Action Information Link Team (RAIL Team) is a group of experienced product and
application engineers ready to assist you to resolve any technical issues concerning this product.
Contact the RAIL Team at 1-800-652-7276 or by e-mail at [email protected].
SM 9082, Original, February 2004
6-1
Technical Support
6-2
SM 9082, Original, February 2004